Output voltage of rectifiers

Discussion in 'Homework Help' started by Derek Lim, Oct 13, 2015.

  1. Derek Lim

    Thread Starter New Member

    Oct 13, 2015
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    In class, my professor only went over half wave, full wave and full wave bridge rectifiers. Looking at problem #1 on the homework, I don't know how to calculate the output voltage. HW2a.jpg
     
  2. Papabravo

    Expert

    Feb 24, 2006
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    You need to show some effort in order to get some help. We don't provide answers, but guidance.
     
  3. WBahn

    Moderator

    Mar 31, 2012
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    Pick one of them and show your best attempt to analyze it. We can then help you through that one and, armed with the knowledge gained, you can then attempt another. Probably after just one or two rounds you will be able to solve the rest on your own.
     
  4. Derek Lim

    Thread Starter New Member

    Oct 13, 2015
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    So for #1, would it even be considered a full wave rectifier? If it is, then the output voltage would be 0.9*Vrms. But with the 0.7V drop per diode, I'm not sure how to account for that.
     
  5. WBahn

    Moderator

    Mar 31, 2012
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    How are you coming up with 0.9*Vrms?

    Sketch what you expect for the waveform.
     
  6. ISB123

    Well-Known Member

    May 21, 2014
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    You are going to struggle with other circuits if you can't figure what voltage at #1 is.

    I'm just going to say that Jimi Hendrix would create his effects with very similar circuit.
     
  7. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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    Number 2 will probably start out at 5.6V for about a couple of seconds, then puff, the zener blows, and its 12V!!! 
     
  8. crutschow

    Expert

    Mar 14, 2008
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    Do not try to calculate the RMS value of the waveforms.
    Just trace what is happening during a single cycle of the waveform and note the voltages at the points in the cycle where the diodes conduct and where they don't.

    As Dodgydave noted, several of the circuits would fail in practice, thus are bad examples.
    But I think your professor wants you to assume ideal components and ignore any possible failures.
     
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